In-N-OutTwo Slices of Cheese melted between two Hamburger Patties. That's it.CheeseBurgerSimply ask for a "Flying Dutchman". This is a well-known secret. However, if the cashier is new, then you can explain that it is two slices of cheese between two burger patties.All Locations4 - Medium$2.10http://hackthemenu.com/in-n-out/secret-menu/flying-dutchman/The Flying Dutchman at In-N-Out is the most interesting "meal" on the secret menu. The Flying Dutchman is two beef patties sandwiched around two slices of cheese. That�s it, that is the Flying Dutchman. There's no lettuce, no onions, and definitely no bun. Of course you can always ask for those extra toppings, if so desired. Be sure to check out the In-N-Out Secret Menu as well as visiting our home page to check out the complete list of All the Secret Menus from all your favorite restaurants!